How to check if two objects are equal in JavaScript?

Published March 18, 2021

To check if two objects are equal, you can first make both the objects into a JSON string using the JSON.stringify() method and then check to see if the string representation of both the objects is equal in JavaScript.

For example, let's say we have 2 objects with a property called name and value of John Doe like this,

// 2 objects with same the property and values
const obj1 = { name: "John Doe" };
const obj2 = { name: "John Doe" };

// Check if 2 objects are equal using
// the JSON.stringify() method
JSON.stringify(obj1) === JSON.stringify(obj2); // true
  • The above expression will return boolean true since the string representation of objects is equal and we can infer that objects are also equal.

  • Using JSON.stringify() method is a fast approach.

See the above code live in JSBin.

Caveat: We can only use this method for simple JSON representative objects and other complex objects with many nested methods and DOM nodes may not work as expected.

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